Question

what happens to the earths crust as new crust is formed at divergent boundaries? the total crust volume decreases. the total crust volume remains constant. the total crust volume varies randomly.

Explanation:

At divergent boundaries, new crust is formed. However, at convergent boundaries, old crust is subducted (forced beneath other crust). The rate of crust formation at divergent boundaries is approximately equal to the rate of crust destruction at convergent boundaries. This balance keeps the total volume of the Earth's crust relatively constant.

Answer:

The total crust volume remains constant.